diff --git a/poetry/core/version/helpers.py b/poetry/core/version/helpers.py
index 6ca22228e..bd46e8d2d 100644
--- a/poetry/core/version/helpers.py
+++ b/poetry/core/version/helpers.py
@@ -20,6 +20,7 @@
     "3.6.*",
     "3.7.*",
     "3.8.*",
+    "3.9.*",
 ]